Example: Calculate the theoretical density of Al; Lattice parameter, a=4.05stackrel (circ )(A) Arrangement: FCC. Atomic weight of Al is 26.98g/mol Example: Calculate the density of solid crystalline BCC chromium (51.9g/mol) in gram/cm^3 Given r=128 pm

** **Contoh 2: Calculate the density of solid crystalline BCC chromium \( (51.9 \, \text{g/mol}) \) in ***Given:*- **Penjelasan:**For a BCC lattice, the relationship between the lattice parameter and the atomic radius is: The density ( ) can be calculated using the formula: where:- is the number of atoms per unit cell (BCC: )- is the atomic weight- is Avogadro's number ( )- is the lattice parameter**Jawaban:**First, calculate : Then, calculate the density:

**Density ( ) for a FCC lattice can be calculated using the formula: where:- is the number of atoms per unit cell (FCC: )- is the atomic weight- is Avogadro's number ( )- is the lattice parameter**